Three-phase asynchronous motor with waterproof function

Abstract

This utility model discloses a waterproof three-phase asynchronous motor, relating to the technical field of three-phase asynchronous motors. The utility model includes a three-phase asynchronous motor with a junction box mounted on its top. It also includes a waterproof mechanism located on the front of the junction box, comprising a rectangular frame fixedly connected to the front of the junction box. This utility model achieves a double seal by inserting an annular rubber plug into a hole, then placing a locking cover on several wire harnesses, and finally placing a rubber sealing ring on the wire harnesses. A ring spring applies elastic force to the rubber sealing ring, improving the sealing effect. When the locking cover is locked to the rectangular frame, an extension ring pushes and compresses the rubber sealing ring, achieving another seal. The combination of the annular rubber plug and the rubber sealing ring provides a double seal, effectively preventing water from entering the junction box, ensuring stable operation of the three-phase asynchronous motor, and extending its service life.

Description

Technical Field

[0001] This utility model belongs to the technical field of three-phase asynchronous motors, and in particular relates to a three-phase asynchronous motor with waterproof function. Background Technology

[0002] Three-phase asynchronous motors are a type of induction motor widely used in industrial and power fields. According to the rotor structure, they can be divided into two types: squirrel-cage and wound-rotor. The squirrel-cage structure is simple and low in cost, and is suitable for most conventional scenarios. The wound-rotor improves starting performance and speed regulation capability through slip rings and external rheostats, and is mostly used in scenarios requiring high starting torque, such as lifting equipment.

[0003] The existing junction boxes on three-phase asynchronous motors typically have wire harnesses passed through them and connected. However, the connection between the wire harness and the junction box is only fitted with a rubber sleeve, which is relatively loose, resulting in poor sealing. When used in areas with a lot of water, water can easily enter the junction box through the gaps at the connection, causing water to accumulate inside the junction box and potentially damaging the three-phase asynchronous motor. Utility Model Content

[0004] The purpose of this invention is to provide a waterproof three-phase asynchronous motor. This is achieved by inserting an annular rubber plug into the hole, then placing a locking cover over several wire harnesses, and finally placing a rubber sealing ring over the wire harnesses. A ring spring applies elastic force to the rubber sealing ring, improving the sealing effect. When the locking cover is locked to the rectangular frame, the extension ring pushes and squeezes the rubber sealing ring, achieving a second seal. The combination of the annular rubber plug and the rubber sealing ring provides a double seal, effectively preventing water from entering the junction box. This ensures stable operation of the three-phase asynchronous motor and extends its service life. This invention solves the problem of existing three-phase asynchronous motor junction boxes, where wire harnesses are typically passed through and connected, but the connection point is only fitted with a loose rubber sleeve, resulting in poor sealing. In areas with high water content, water can easily enter the junction box through gaps at the connection point, causing damage to the three-phase asynchronous motor.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model relates to a waterproof three-phase asynchronous motor, comprising a three-phase asynchronous motor, a junction box mounted on the top of the three-phase asynchronous motor, a cover plate provided on the top of the junction box, and further comprising:

[0007] A waterproof mechanism is provided on the front of the junction box. The waterproof mechanism includes a rectangular frame fixedly connected to the front of the junction box. A locking cover is provided on the front of the rectangular frame. At least two holes are formed inside the rectangular frame. An annular rubber plug is fitted inside each hole. A wire harness is inserted into the inner ring of the annular rubber plug. A rubber sealing ring is fitted outside the wire harness. An extension ring corresponding to the number of holes is fixedly connected to the back of the locking cover.

[0008] An interception mechanism is provided on the right side of the three-phase asynchronous motor. The interception mechanism is used to intercept water stains on the heat dissipation parts of the three-phase asynchronous motor. The rectangular frame is integrally formed with the junction box, and the wire harness extends through the annular rubber plug into the interior of the junction box.

[0009] Furthermore, the inner ring of the annular rubber plug contacts the surface of the wire harness, the inner ring of the rubber sealing ring contacts the surface of the wire harness, and the back of the rubber sealing ring contacts the inner wall of the rectangular frame; both the annular rubber plug and the rubber sealing ring seal the connection of the wire harness to prevent water stains from entering.

[0010] Furthermore, the rubber sealing ring has an annular groove inside, and an annular spring is installed inside the annular groove. The front of the rubber sealing ring is tapered, and the front of the rubber sealing ring contacts the back of the extension ring. Because an annular spring is installed inside the rubber sealing ring, an elastic force can be applied to the rubber sealing ring, so that the inner ring of the rubber sealing ring is tightly attached to the surface of the wire harness, thereby improving the sealing effect.

[0011] Furthermore, a dust cover is fitted on the right side of the three-phase asynchronous motor and fixed with screws. The interception mechanism includes a shield fixedly connected to the right side of the dust cover. Several drainage grooves are opened at the bottom of the dust cover, and a heat dissipation vent is opened on the right side of the dust cover. The bottom of the shield is open, and the shield and the dust cover are integrally formed. Since the bottom of the shield is open, it will not affect the heat dissipation of the three-phase asynchronous motor.

[0012] Furthermore, the locking cover is fitted onto the wiring harness, and the locking cover is fixedly connected to the rectangular frame by screws. A sealing ring is fitted onto the top of the junction box, and the cover plate is placed on top of the sealing ring. The four corners of the cover plate are fixedly connected to the junction box by screws. The sealing ring is fitted onto the junction box, and then the cover plate is joined to the junction box and locked with bolts, thereby waterproofing the top of the junction box.

[0013] This utility model has the following beneficial effects:

[0014] 1. This utility model involves inserting an annular rubber plug into the hole, then placing a locking cover on several wire harnesses, and finally placing a rubber sealing ring on the wire harnesses. The annular spring applies elastic force to the rubber sealing ring to improve the sealing effect. When the locking cover is locked and fixed to the rectangular frame, the extension ring pushes and squeezes the rubber sealing ring, achieving a sealing effect again. The combination of the annular rubber plug and the rubber sealing ring achieves a double seal, which can effectively prevent water stains from entering the junction box, enabling the three-phase asynchronous motor to operate stably and improving its service life.

[0015] 2. This utility model uses a shield to block the heat dissipation vents on the dust cover, reducing the amount of water entering the interior. Furthermore, the bottom of the shield is open, so it will not affect the heat dissipation of the three-phase asynchronous motor. If water leaks into the dust cover, it can be drained through the drainage groove at the bottom of the dust cover, thus preventing water from accumulating and remaining.

[0016] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the overall structure of the junction box of this utility model;

[0020] Figure 3 This is a schematic diagram of the left sectional view of the rectangular frame of this utility model;

[0021] Figure 4 This is a schematic diagram of the internal structure of the rectangular frame of this utility model;

[0022] Figure 5 This is a schematic diagram of the overall structure of the rubber sealing ring of this utility model;

[0023] Figure 6 This is a schematic diagram of the overall structure of the locking cover of this utility model;

[0024] Figure 7 This is a schematic diagram of the overall structure of the interception mechanism of this utility model.

[0025] The attached diagram lists the components represented by each number as follows:

[0026] 1. Three-phase asynchronous motor; 11. Junction box; 111. Sealing ring; 12. Cover plate; 13. Dust cover; 2. Waterproof mechanism; 21. Rectangular frame; 211. Hole; 212. Annular rubber plug; 22. Locking cover; 221. Extension ring; 23. Wiring harness; 24. Rubber sealing ring; 241. Annular groove; 242. Annular spring; 3. Interception mechanism; 31. Shielding cover; 32. Drainage groove. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0028] Please see Figures 1-7 As shown, this utility model is a waterproof three-phase asynchronous motor, including a three-phase asynchronous motor 1, a junction box 11 mounted on the top of the three-phase asynchronous motor 1, a cover plate 12 provided on the top of the junction box 11, and further including:

[0029] Waterproof mechanism 2 is located on the front of junction box 11. Waterproof mechanism 2 includes a rectangular frame 21 fixedly connected to the front of junction box 11. A locking cover 22 is provided on the front of the rectangular frame 21. At least two holes 211 are provided inside the rectangular frame 21. An annular rubber plug 212 is fitted inside each hole 211. A wire harness 23 is inserted into the inner ring of the annular rubber plug 212. A rubber sealing ring 24 is fitted outside the wire harness 23. An extension ring 221 corresponding to the number of holes 211 is fixedly connected to the back of the locking cover 22. Waterproof mechanism 2 can be achieved by inserting the annular rubber plug 21 into each hole 211. 2. Next, the locking cover 22 is placed on several wire harnesses 23, and the rubber sealing ring 24 is placed on the wire harnesses 23. The annular spring 242 can apply elastic force to the rubber sealing ring 24 to improve the sealing effect. When the locking cover 22 is locked and fixed to the rectangular frame 21, the extension ring 221 will push and squeeze the rubber sealing ring 24 to achieve the sealing effect again. The annular rubber plug 212 and the rubber sealing ring 24 cooperate to achieve a double seal, which can effectively prevent water stains from entering the junction box 11, so that the three-phase asynchronous motor 1 can operate stably and improve its service life; and

[0030] The interception mechanism 3 is located on the right side of the three-phase asynchronous motor 1. The interception mechanism 3 is used to intercept water stains on the heat dissipation part of the three-phase asynchronous motor 1. The rectangular frame 21 is integrated with the junction box 11, and the wire harness 23 extends into the junction box 11 through the annular rubber plug 212.

[0031] The inner ring of the annular rubber plug 212 contacts the surface of the wire harness 23, the inner ring of the rubber sealing ring 24 contacts the surface of the wire harness 23, and the back of the rubber sealing ring 24 contacts the inner wall of the rectangular frame 21.

[0032] The rubber sealing ring 24 has an annular groove 241 inside, and an annular spring 242 is installed inside the annular groove 241. The front of the rubber sealing ring 24 is tapered, and the front of the rubber sealing ring 24 contacts the back of the extension ring 221.

[0033] A dust cover 13 is fitted on the right side of the three-phase asynchronous motor 1 and fixed with screws. The interception mechanism 3 includes a shield 31 fixedly connected to the right side of the dust cover 13. Several drainage grooves 32 are opened at the bottom of the dust cover 13. A heat dissipation vent is opened on the right side of the dust cover 13. The bottom of the shield 31 is open. The shield 31 and the dust cover 13 are integrally set. The heat dissipation vent on the dust cover 13 is intercepted by the shield 31, reducing water stains from entering the interior. Since the bottom of the shield 31 is open, it will not affect the heat dissipation of the three-phase asynchronous motor 1. If water stains leak into the dust cover 13, the water stains can be discharged through the drainage grooves 32 at the bottom of the dust cover 13, thereby preventing water stains from accumulating and remaining.

[0034] The locking cover 22 is fitted onto the wire harness 23. The locking cover 22 is fixedly connected to the rectangular frame 21 by screws. The top of the junction box 11 is fitted with a sealing ring 111. The cover plate 12 is set on top of the sealing ring 111. The four corners of the cover plate 12 are fixedly connected to the junction box 11 by screws.

[0035] One specific application of this embodiment is:

[0036] When connecting the wire harness 23 to the junction box 11, first insert the annular rubber plug 212, which is compatible with the size of the wire harness 23, into the hole 211. Then, put the locking cover 22 on several wire harnesses 23. Next, put the rubber sealing ring 24 on the wire harness 23, and select a rubber sealing ring 24 that is compatible with the size of the wire harness 23. Since the rubber sealing ring 24 has an annular spring 242 inside, it can apply elastic force to the rubber sealing ring 24, so that the inner ring of the rubber sealing ring 24 is tightly attached to the surface of the wire harness 23, improving the sealing effect. Then, insert the wire harness 23 through the annular rubber plug 212 and extend it into the junction box 11 for wiring. After the wire harness 23 is wired, push the locking cover 22 to the position of the rectangular frame 21 and use screws to fix the locking cover 22 to the rectangular frame 21. At this time, the extension ring 221 will... The rubber sealing ring 24 is pushed and squeezed to make it fit tightly against the inner wall of the rectangular frame 21, thereby achieving a sealing effect again. This method achieves double sealing through the cooperation of the annular rubber plug 212 and the rubber sealing ring 24, which can effectively prevent water stains from entering the junction box 11. Then, the sealing ring 111 is put on the junction box 11, and then the cover plate 12 is connected to the junction box 11 and locked with bolts, thereby waterproofing the top of the junction box 11. When the three-phase asynchronous motor 1 is working, the shield 31 will block the heat dissipation vent on the dust cover 13, reducing water stains from entering the interior. The bottom of the shield 31 is open, so it will not affect the heat dissipation of the three-phase asynchronous motor 1. If water stains leak into the dust cover 13, the water stains can be discharged through the drainage groove 32 at the bottom of the dust cover 13, thereby preventing water stains from accumulating and remaining.

[0037] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0038] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the present utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A waterproof three-phase asynchronous motor, comprising a three-phase asynchronous motor, wherein a junction box is mounted on the top of the three-phase asynchronous motor, and a cover plate is provided on the top of the junction box, characterized in that, Also includes: A waterproof mechanism is provided on the front of the junction box. The waterproof mechanism includes a rectangular frame fixedly connected to the front of the junction box. A locking cover is provided on the front of the rectangular frame. At least two holes are formed inside the rectangular frame. An annular rubber plug is fitted inside each hole. A wire harness is inserted into the inner ring of the annular rubber plug. A rubber sealing ring is fitted outside the wire harness. An extension ring corresponding to the number of holes is fixedly connected to the back of the locking cover. An interception mechanism is provided on the right side of the three-phase asynchronous motor, and the interception mechanism is used to intercept water stains on the heat dissipation parts of the three-phase asynchronous motor. The rectangular frame and the junction box are integrally formed, and the wire harness extends into the junction box through the annular rubber plug.

2. A three-phase asynchronous motor with waterproof function according to claim 1, characterized in that, The inner ring of the annular rubber plug contacts the surface of the wire harness, the inner ring of the rubber sealing ring contacts the surface of the wire harness, and the back of the rubber sealing ring contacts the inner wall of the rectangular frame.

3. A three-phase asynchronous motor with waterproof function according to claim 2, characterized in that, The rubber sealing ring has an annular groove inside, and an annular spring is installed inside the annular groove. The front of the rubber sealing ring is tapered, and the front of the rubber sealing ring contacts the back of the extension ring.

4. A three-phase asynchronous motor with waterproof function according to claim 3, characterized in that, The right side of the three-phase asynchronous motor is fitted with a dust cover and fixed with screws. The interception mechanism includes a shield fixedly connected to the right side of the dust cover. Several drainage grooves are opened at the bottom of the dust cover.

5. A three-phase asynchronous motor with waterproof function according to claim 4, characterized in that, The dust cover has a heat dissipation vent on the right side, and the bottom of the shield is open. The shield and the dust cover are integrated into one piece.

6. A three-phase asynchronous motor with waterproof function according to claim 3, characterized in that, The locking cover is sleeved on the wire harness, and the locking cover is fixedly connected to the rectangular frame by screws.

7. A three-phase asynchronous motor with waterproof function according to claim 2, characterized in that, A sealing ring is fitted on the top of the junction box, and a cover plate is placed on top of the sealing ring. The four corners of the cover plate are fixedly connected to the junction box by screws.

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